Deep-well pump.



W. B. HEWETT.

DEEP WELL PUMP.

APPLICATION FILED FEB. 1s. 1916.

Patented Mar. 13, 1917.

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-shown as driven by narran sraras rafranr ersten WILLIAM B. HEWITT, OF I-IOLYOKE, MASSACUSETTS, ASSIGNOR, BY MESNE ASSIGN MENTS, T0 WORTHINGTON PUMP AND MACHINERY CORPORATION, OF NEW YORK,

N. Y., A CORPORATION OF VIRGINIA.

DEEP-WELL PUMP.

Specification of Iietters Patent.

Y Patented Mar. 13, 1917.

Application 'filed February 18, 1916. Serial No. 79,019.

ing, in which a plurality of reciprocating buckets or plunger-s act on the liquid successively, the especial object of the invention being to increase the capacity and port area of the buckets or plungers of such pumps and to secure a higher volumetric ciiiciency. The invention aims particularly at'the production of a satisfactory tripleacting power pump securing the above results. i

In the accompanying drawings forming a part' of this specification a triple-acting deep-well pump embodying the invention in its preferred form is shown, and this construction will now be described in detail and the features forming. the invention then speciiically pointed out in the claims.

In the drawingsy Figure 1 is a front view of the pump, with the pump head .in elevation and theV pump well in section, and with parts of the bucket rods broken away to show the construction, and

Fig. 2 is a vertical central section on the line 2 2 of Fig. 1.

Referring to the drawings, the pump shown is in general construction and arrangement that of my prior Letters Patent No. 1,102,583, dated July 7 th, 191%1, in which A is the pump head frame mounted above the well B, and carrying the crank shaft C, gear D from power shaft E and pinion F, The crank shaft C carries separate cranks for operating the three buckets, these cranks being set at 120O apart, and connected to the respective buckets by crank rods 10 connected to crosshead guides 11, rods 12, 13 and 1G extending from the cross heads, and yokes 14, 17, for the outer bucket rods, the crank-shaft thus being connected to the central and two outer concentric bucket rods 12, 15, 18 which are This invention relates to that class of pumps used especially for deepy well pump-` connected, respectively, to the bottom, middle and top buckets G, H, 1 within the drop tube L terminating in the discharge head K having the discharge pipe 19, all generally as fully described inthe above Letters Patent. The drop tube L and bucket rods for pumps of considerable depths will be formed in sections and connected together, so as to sink the pump to any depth desired, these pumps being frequently used for great depths, as

'well understood inthe art.

Referring nowv to the detailed construction of the well portion, each of the bucket rods 12, 15, 18, passes through a suitable packing 20, the inner and intermediate rods thus being packed in the yokes 14e and 17 at the upper ends, respectively, of the intermediate and outer rods, and the outer rods thus being packed in the top plate of the delivery head K. The sections of the inner rod 12 are connected by couplings l and the sections of the intermediate rod by couplings 2, the couplings of the outerlrod 18 not being shown. The pump buckets are provided with the usual packing rings 8, and, in addition thereto, the two upper buckets H, I are provided with internal guides and packing carried within the respective couplings 21, by which the intermediate and outer rods are coupled to their buckets. The coupling piece 21 carries internally a centering bearing ring t in which the respective rods have their bearing, and suitable packing rings 5, 6 are mounted above and below the bearing ring, the bearing ring and packing rings being held in place by cap 7. The upper packing ring 5 prevents the passage of water or lubricant downward from the space between the inner and outer rods into the chamber between the buckets, and the lower rings 6 prevent the upward movement of water from the chamber and form wipers by which the entrance of sand or grit between the rod and bearing ring 4 is prevented. IThe hollow rods above the combined bearing and packing rings are preferably kept filled with lubricant, as the couplings of the inner rods are liable to bear upon the inclosing rods, and, as shown, inlet pipes 22, 23 communicate, respectively, with the'spaces inside the intermediate and outer rods, and the water, oil, or other lubricant may be supplied as desired through flexible pipes 2&1, while the pumpis running, either continuously or the pipes may be filled lirst and then the valves controlling pipes 22, 23 closed. `Air relief valves for the lubricant spaces are provided at 25. The construction above described, with the combined bearing and packing rings and means for lubricating the annular spaces between the rods is described and claimed in my application Serial No. 815,619, iiled January 31st1 1914:.

Referring now to the present invention, it is important that the capacity of the buckets and their port and valve area, should be as large as possible within the transverse dimensions of the drop tube L, this being especially important in such deepwell pumps. In the construction of such pumps, also, the buckets should be of the saine capacity and port and valve area, so as to secure the desired action, and are preferably made duplicates, so that repair parts will lit any bucket, thisI being import-ant on account of the distance of such Artesian or other deep wells from the .iiactory and the importance of inunediate repair and replacement oli, parts, in order to secure thc necessary continuous operation ot such pumps, especially when used -for irrigation and similar purposes. In such pumps as heretofore constructed, the intermediate rod has reduced considerably the capacity and port and valve areaof the top bucket` by its comparatively large size in passing through that bucket, thus in practice reducing the capacity and port and valve area of all the buckets.

I avoid this defect in previous pumps, and largely increase the capacity and port and valve area of the buckets, by reducing the size of the intermediate rod where it passes through the top bucket, so that the portion of the bucket and valve occupied by the intermediate rod is correspondingly lessened. rlhis result is secured in the construction shown by making the section 15 ot' the intermediate rod, where it passes through the top bucket I,and for such a length as to permit the movement of the top and intermediate buckets, of a small size as compared with the sections of the intermediate rod 15 above this point where they inclose the coupling or couplings 1 of the rod 12 for the bottom. bucket, considerable reduction in size thus being` permitted so as to considerably increase the capacity of bucket I and the size of its port and valve 26, As all the buckets and valves are commercially made duplicates, as above eX- plained, this increases correspondingly the size and port and valve area of all the buckets, This reduction in size of the intermediate rod not only increases the bucket capacity and port and valve area through .the buckets, but it also increases the allowable speed of operation of the pump, because of the freer flow of the liquid through the larger ports, and the larger port area also reduces materially the velocity oi' flow through the buckets and the cutting action of sand on the valve faces is thus practically eliminated, which is especially important in pumping a new well. y This reduction in size of the intermediate rod also gives extra room for the bearing ring t packingrings 5, G, and cap 7. In the construction shown, in which the rods are connected to the buckets by sections 8 extending through the valves 26 and secured to the valve seat or body of the bucket below the valve, the section 8 for the top bucket is reduced in size below the coupling 21, as compared with the portion of he rod 18 above the coupling` where it incloses the couplings 2 oli the intermediate rod 15, thus enabling the desired increase in capacity and port and valve area of the top bucket to be secured. The connecting sections 8 of the other buckets will be made the salue size as .that of the top bucket, as shown in connection with the intermediate bucket, so as to make the buckets, and valves duplicates, and the capacity and port arca of all the buckets the same.

It will be apparent that differential pressure upon the intermediate bucket rod will be caused by the reduction in size of the intermediate rod above the top bucket, unless this is compensated 'for in some way. llVhile not absolutely necessary, such compensation is preferable, and is secured in the construction shown by reducing the upper end of the intermediate rod correspondingly above the discharge chamber K at coupling 2, or at such point as to be above any couplings of theinner rod 12 inside the intermediate rod.

It will be understood that the invention is not limitied to the exact construction or arrangement of parts shown, but that these may be modified widely within the invention defined by the claims.

What is claimed is:

1. A pump having a plurality of independently movable buckets or plungers arranged in line and having concentric bucket or plunger rods, and having the hollow rod of an intermediate bucket or plunger formed ,of a larger cross-section for inclosing the inner rod and a smaller crosssection throughout the portion traversed by the upper bucket or plunger whereby space for the inner rod is provided and the reduction in capacity and port and valve area of the upper bucket by the intermediate rod diminished.

2. A pump having a plurality of independently movable buckets or plungers arranged in line and having concentric bucket or plunger rods, and having the rod vof an intermediate bucket or plunger formed of a larger cross-section for inclosing the inner rod and a smaller cross-section throughout the portion traversed by the upper bucket or plunger, and having the rod of the ripper bucket or plunger made of a larger cross-section for inclosing the intermediate rod and a smaller cross-section for connection to its bucket, whereby the required size of the intermediate and outer' 'rods for inclosing the rods inside them is provided, and the reduction in capacity and port and valve area of the upper bucket by the rods diminished.

3. A pumphaving a plurality of independently movable buckets or plungers arranged in line and having concentric bucket or plunger rods, and having the rod of an intermediate bucket or plunger formed of a larger cross-section for inclosing the inner rod and a smaller cross-section throughoutthe portion traversed by the upper bucket or plunger, whereby space for the inner rod is provided and the reduction in capacity and port and valve area of the upper bucket by the intermediate rod diminished, said intermediate rod also being reduced in crosssection at its upper end to balance the pressures on the intermediate rod.

ei. A pump having a plurality of independently movable buckets or plungers arranged in line and having concentric bucket or plunger rods, and having the rod of an intermediate bucket or plunger formed of a larger cross-section for inclosing the inner rod and a smaller cross-section throughout the portion traversed by the upper bucket or plunger, whereby space for the inner rod is provided and the reduction in capacity and port and valve area of the upper bucket by the intermediate rod diminished, a ring mounted internally on the outer rod to form a bearing for the reduced portion of the intermediate rod, and a packing joint to prevent leakage past the bearing ring.

5. A pump having a plurality of independently movable buckets or plungers arranged in line and having concentric bucket or plunger rods, and having the rod of an intermediate bucket or plunger formed of a larger cross-section for inclosing the inner rod and a smaller cross-section throughout the portion traversed by the upper bucket or plunger, whereby space for the inner rod is provided and the reduction in capacity and port valve area of the upper bucket by the intermediate rod diminished, means to supply lubricant to the annular space between the intermediate and outer rod, a ring mounted internally on the outer rod at the bottom of the lubricant space to form a bearing for the reduced portion of theintermediate rod, and a packing joint to prevent leakage past the bearing ring.

6. A pump having a plurality of independently movable buckets or plungers arranged in line and having concentric bucket or plunger rods, and having the rod of an intermediate bucket or plunger formed of a larger cross-section throughout the portion traversed by the upper bucket or pliniger, whereby space for the inner rod is provided and the reduction in capacity and port and valve area of the upper bucket by the intermediate rod dii'ninished, a ring mounted internally on the outer rod to form a bearing for the reduced portion of the intermediate rod, a packing joint below the ring to prevent the movement of sand into the space between the ring and rod, and a packing joint above the ring.

7. The combination with independently movable buckets or plungers G, H, I arranged in line vertically and having concentric rods 12, 15, 18, ot one or more couplings 1 connecting the sections of the inner rod 12 within intermediate rod 15, and one or more couplings 2 connecting the sections of the intermediate rod 15 within outer rod 18, said intermediate rod having reduced section 15a below couplings 1 throughout the portion traversed by bucket I.

8. The combination with independently movable buckets or plungers G, H, I arranged in line and having concentric rods 12, ,15, 18, of one or more couplings 1 connecting the sections of the inner rodA 12 within intermediate rod 15, and. one or more couplings 2 connecting the sections of the intermediate rod 15 within outer rod 18, said intermediate rod having reduced section 15a below couplings 1 throughout the portion traversed by bucket I, and said outer rod 18 being reduced in size below couplings 2 and connected to its bucket by such reduced portion.

9. The combination with independently movable buckets or plungers G, H, I arranged in line and having concentric rods 12, 15, 18, of one or more couplings 1 connecting the sections of the inner rod 12 within intermediate rod 15, and one or more couplings 2 connecting the sections of the intermediate rod 15 within outer rod 18, said intermediate rod having reduced section 15 below couplings 1 throughout the portion traversed by bucket I, and connection piece 8 extending centrally through bucket I and of smaller cross-section than rod 18.

In testimony whereof, I have hereunto set my hand.

WILLIAM B. HEWITT.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

